<template>
    <div class="sub-sort">
        <div class="sort">
            <a :class="{active:sortParams.sortField === null}" @click="changeSort(null)" href="javascript:;">默认排序</a>
            <a :class="{active:sortParams.sortField === 'publishTime'}" @click="changeSort('publishTime')" href="javascript:;">最新商品</a>
            <a :class="{active:sortParams.sortField === 'orderNum'}" @click="changeSort('orderNum')" href="javascript:;">最高人气</a>
            <a :class="{active:sortParams.sortField === 'evaluateNum'}" @click="changeSort('evaluateNum')" href="javascript:;">评论最多</a>
            <a @click="changeSort('price')" href="javascript:;">
                价格排序
                <i class="arrow up" :class="{active:sortParams.sortField === 'price' && sortParams.sortMethod === 'asc'}" />
                <i class="arrow down" :class="{active:sortParams.sortField === 'price' && sortParams.sortMethod === 'desc'}" />
            </a>
        </div>
        <div class="check">
            <XtxCheckbox @change="changeCheck" v-model="sortParams.inventory">仅显示有货商品</XtxCheckbox>
            <XtxCheckbox @change="changeCheck" v-model="sortParams.onlyDiscount">仅显示特惠商品</XtxCheckbox>
        </div>
    </div>
</template>
<script>
import { reactive } from 'vue';
export default {
    name: "SubSort",
    setup(props,{emit}){
        const sortParams = reactive({
            inventory:false, //库存
            onlyDiscount:false, //特惠
            sortField:null,
            sortMethod:null
        })
        // 提供模板使用
        // 需要绑定按钮点击事件 修改排序字段 方式
        const changeSort = (sortField) => {
            if (sortField === 'price') {
                sortParams.sortField = sortField
                // 处理排序
                if (sortParams.sortMethod === null) {
                    sortParams.sortMethod = 'desc'
                }else{
                    sortParams.sortMethod = sortParams.sortMethod === 'desc' ? 'asc' : 'desc'
                }
            }else{
                if(sortParams.sortField === sortField) return
                sortParams.sortField = sortField
                sortParams.sortMethod = null
            }
            // 触发sortChane 事件
            emit('sort-change',sortParams)
        }
        // 
        const changeCheck = (val) => {
            // 触发sortChane 事件
            emit('sort-change',sortParams)
        }
        return {
            sortParams,
            changeSort,
            changeCheck
        }
    }
};
</script>
<style scoped lang='less'>
.sub-sort {
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    .sort {
        display: flex;
        a {
            height: 30px;
            line-height: 28px;
            border: 1px solid #e4e4e4;
            padding: 0 20px;
            margin-right: 20px;
            color: #999;
            border-radius: 2px;
            position: relative;
            transition: all 0.3s;
            &.active {
                background: @xtxColor;
                border-color: @xtxColor;
                color: #fff;
            }
            .arrow {
                position: absolute;
                border: 5px solid transparent;
                right: 8px;
                &.up {
                    top: 3px;
                    border-bottom-color: #bbb;
                    &.active {
                        border-bottom-color: @xtxColor;
                    }
                }
                &.down {
                    top: 15px;
                    border-top-color: #bbb;
                    &.active {
                        border-top-color: @xtxColor;
                    }
                }
            }
        }
    }
    .check {
        .xtx-checkbox {
            margin-left: 20px;
            color: #999;
        }
    }
}
</style>